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P1824 2018 Chevrolet Silverado Code - Internal Mode Switch 'P' Circuit Low Voltage

Quick Answer

The P1824 diagnostic trouble code (DTC) specifically refers to an issue with the internal mode switch 'P' circuit in a 2018 Chevrolet Silverado. Common causes include Faulty internal mode switch, Damaged or corroded wiring/connectors in the 'P' circuit, Issues with the TCM. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P1824 2018 Chevrolet Silverado indicates Internal Mode Switch 'P' Circuit Low Voltage.
Common causes
Common causes include Faulty internal mode switch, Damaged or corroded wiring/connectors in the 'P' circuit, Issues with the TCM.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code P1824 2018 Chevrolet Silverado Description

The P1824 diagnostic trouble code (DTC) specifically refers to an issue with the internal mode switch 'P' circuit in a 2018 Chevrolet Silverado. The internal mode switch is a crucial component within the transmission control system. It is responsible for providing input to the transmission control module (TCM) regarding the gear selection made by the driver. In this case, the code indicates that the voltage level in the 'P' circuit is lower than the expected range, suggesting a potential malfunction within the internal mode switch or its associated wiring.

OBDII Code P1824 2018 Chevrolet Silverado - Internal Mode Switch 'P' Circuit Low Voltage
P1824 2018 Chevrolet Silverado Code - Internal Mode Switch 'P' Circuit Low Voltage

Common Causes of P1824 2018 Chevrolet Silverado

  1. Faulty internal mode switch
  2. Damaged or corroded wiring/connectors in the 'P' circuit
  3. Issues with the TCM
  4. Low transmission fluid level
  5. Electrical issues within the transmission control system

Symptoms of P1824 2018 Chevrolet Silverado

  1. Rough or delayed shifting
  2. Inability to shift into certain gears
  3. Transmission slipping
  4. Illumination of the check engine light
  5. Reduced fuel efficiency

How to Fix P1824 2018 Chevrolet Silverado

  1. Perform a thorough diagnostic scan to confirm the presence of the P1824 code and pinpoint the exact cause of the low voltage condition.
  2. Inspect the internal mode switch and its wiring for any signs of damage, corrosion, or loose connections. Replace or repair as necessary.
  3. Check the transmission fluid level and condition. Top up or replace the fluid if needed.
  4. Test the TCM and related components for proper functioning. Repair or replace any faulty parts.
  5. Clear the DTC and reset the TCM to ensure the code does not reappear after repair.

Cost to Fix P1824 2018 Chevrolet Silverado

The typical repair costs for addressing the P1824 code in a 2018 Chevrolet Silverado can vary depending on the specific cause of the issue and the extent of repairs needed. On average, the parts required for this repair may range from $100 to $300, while labor costs can add another $150 to $250 to the total bill. Overall, the total repair cost could fall within the $250 to $550 range. However, it's essential to consider that labor rates and part prices can vary significantly based on location, shop rates, and the specific model of the vehicle. It's recommended to consult with a trusted auto repair shop for an accurate estimate tailored to your situation.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1824 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P1824 in a 2018 Chevrolet Silverado?

The common symptoms of code P1824 include issues with shifting gears, erratic shifting patterns, and potential difficulty starting the vehicle.

2. What does the Internal Mode Switch 'P' Circuit Low Voltage mean for a 2018 Chevrolet Silverado?

The Internal Mode Switch 'P' Circuit Low Voltage indicates a problem with the transmission range sensor, specifically related to low voltage detected in the circuit.

3. What are the possible causes of OBDII code P1824 in a 2018 Chevrolet Silverado?

Possible causes of code P1824 include a faulty internal mode switch, damaged wiring or connectors in the circuit, low voltage supply to the switch, or a malfunctioning transmission control module.

4. How can I diagnose OBDII code P1824 in my 2018 Chevrolet Silverado?

Diagnosing code P1824 involves checking the internal mode switch for proper operation, inspecting the wiring and connectors for damage, testing the voltage supply to the switch, and verifying the transmission control module functionality.

5. Can I continue driving my 2018 Chevrolet Silverado with OBDII code P1824?

It is not recommended to drive your vehicle with code P1824, as it can lead to further transmission issues and potential safety hazards. It is best to address the problem promptly.

6. How can I repair OBDII code P1824 in a 2018 Chevrolet Silverado?

Repairing code P1824 may involve replacing the internal mode switch, repairing damaged wiring or connectors, ensuring proper voltage supply, or reprogramming the transmission control module as necessary.

7. Is it possible to reset OBDII code P1824 in a 2018 Chevrolet Silverado without fixing the issue?

Resetting the code without addressing the underlying problem will only temporarily clear the error code. To prevent it from reoccurring, it is essential to diagnose and repair the root cause of code P1824.

8. Can a DIY enthusiast fix OBDII code P1824 in a 2018 Chevrolet Silverado?

Depending on your mechanical skills and access to tools, some DIY enthusiasts may be able to diagnose and repair code P1824. However, dealing with transmission-related issues may require specialized knowledge and equipment, so professional assistance is often recommended.

9. How much does it cost to fix OBDII code P1824 in a 2018 Chevrolet Silverado?

The cost of repairing code P1824 can vary depending on the specific cause of the issue, parts needed for replacement, and labor charges. It is advisable to consult a mechanic for an accurate estimate.

10. Can OBDII code P1824 in a 2018 Chevrolet Silverado cause further damage if left untreated?

Yes, ignoring code P1824 can potentially lead to more severe transmission problems, such as gear slippage, transmission failure, or safety risks while driving. It is best to address the issue promptly to prevent further damage.

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